Bonsoir,

Ex36

a = 9-7 = 2

b = 8+13 = 21

c = -(15-6) = -9

d = 12+12 = 24

e = 15+12 = 27

f = -(4+11) = -15

g = -(8+5) = -13

h = 0

i = 13-8 = 5

j = -(9-5) = -4

Ex38

I = (2+5+7) - (8+3) = 14-11 = 3

J = (3+7+9) - (8+6) = 19-14 = 5

K = (9+11+25) - (15+16) = 45-31 = 14